Hmmm.. I've got dev friends releasing games for XBLIG, DS/DSi, and Vita/PSN and I haven't heard any particular complaints from any of them. I haven't got into any detail about how many hoops they had to jump through to get involved though.

The biggest success stories obviously come from PSN with Sony's strong backing, but for every one of those there's the rest of the PSN market just developing away as normal. Sony only get friendly with games of the VERY best quality, but when they do get involved they make a huge impact.